DRAFT, do not publish. Briefing from the content plan dated 09/14/2026, item 02.
Target keyword: growing spirulina yourself costs
Intent: Consideration before purchase
Reason: None of the three major German guide sites provide a cost calculation. Cost-related questions require a clear figure and are cited by AI systems more frequently than average.
Must be included: Three-year calculation, initial purchase, nutrient salts, culture, electricity for lighting and pump, offset against an equivalent amount of powder. Disclose calculation method.
